US Lookup
Full FCC ULS dossier — operator name, address, license class, grid square, and station details, the moment you type a callsign.
VFO A
73 · DE LPK APPS
Know who's on frequency.
Instant US ham radio callsign lookup — operator name, license class, grid square, and full FCC details. Companion app for callsigncheck.com.
On The Air
Everything you need mid-QSO.
One line in, a full dossier out — built for the moment a callsign lands in your headphones.
DX & QRZ Lookup
Flip to VFO B for international calls — country, CQ/ITU zones, grid square, and QSL manager, sourced live from QRZ.
VFO BBand Conditions
A live HF propagation strip — solar flux, A/K index, and band-by-band conditions pulled straight from the N0NBH feed.
Live dataPhonetic Readout
Every callsign spells itself out loud as you type — Alpha, Bravo, Charlie — so you never fumble a check-in.
NATO alphabetVanity Availability
Check whether a callsign is up for grabs before you file the paperwork with the FCC.
Quick checkAdvanced Search
Hunt by name, city, state, ZIP, or license class when a callsign is only half the picture.
Deep searchW1AW
WHISKEY ONE ALPHA WHISKEY
NameARRL HQ Operators Club
ClassClub
Grid SquareFN31pr
LocationNewington, CT
The Dossier
Built like a rig's faceplate.
No blue links, no clutter — just an amber-on-black readout that feels at home next to your transceiver. Every field is long-press-to-copy.
- Recent lookups and favorites saved on-device, ready for your next net.
- License stats — operators by class and by state, straight from the FCC ULS.
- One search bar handles US and DX — no separate apps, no tab switching.
Still calibrating.
CallSign Check is in active development. Get on the list and we'll ping you the moment it's live on the App Store.